Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76aac2b777f92b2…

MALICIOUS

PDF

72.3 KB Created: 2021-03-24 14:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4db4f1399fcea03bf92922b082203fc0 SHA-1: 5edfc4fcf7ae7e2fdca40611f590e659f774c4fd SHA-256: e76aac2b777f92b2952f1778d23e467e090aa078641a995f4343310b7bf647f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to disposable domains, a common tactic for phishing or malware distribution. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs suggest an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/award?keyword=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+chuy%25E1%25BB%2583n+pdf+sang+jpg+online PDF link annotation
    • http://fafikup.scienceontheweb.net/aqa_sociology_a_level_revision_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/geDiehd/geliluw.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/georges_secret_key_to_the_universe_book_free_download.pdfIn PDF document text
    • https://nusupubibirimu.weebly.com/uploads/1/3/1/8/131871553/fabcccb.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/69450026283.pdfIn PDF document text
    • https://vaxuzumop.weebly.com/uploads/1/3/4/8/134870956/1870050.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/accept_vs_except_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/Deiijbb/lexajibijakamedeso.pdfIn PDF document text
    • https://cdn.sqhk.co/resesexiraf/t9jgjcM/zetofejurudulidi.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/tujujarisewixa.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/b529b3274849390.pdfIn PDF document text
    • https://ginijamuda.weebly.com/uploads/1/3/1/4/131409148/7550429.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/cqONpL6/rewewesedotesimenoduw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/69520941014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e6f438a-db09-4fd3-b125-313631a6f3a4/dibujo_de_carita_feliz.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/zaxabeb.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/vegetarian_meals_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85312583-fd4a-4158-b702-1ec53955e0be/crochet_stand_mixer_cover_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/number_line_worksheet_for_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16414a3-1c91-475a-bc7e-50b8dba3e320/honeywell_k4392v2-h_change_battery.pdfIn PDF document text
    • http://tipipigi.atwebpages.com/kifanezutuwutimapunito.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/53582242422.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/81822878222.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD005 6288 bytes
SHA-256: 1577ee665326d7dc4e003c9bacae110212419782627000e2134fa6f69d448c46
font_01_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 19264 bytes
SHA-256: 7691db37f0a83e275b2118d0604e069b310310255029e0f647aaf47395469bc6

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